Sports betting emerges from its summer slumber this week with the commencement of an NFL season that figures to bring record-shattering business in Washington, D.C., and the 16 states with legal online sportsbooks. Arizona joins the group this week, with Louisiana and Maryland hustling to open later this season. On deck: Connecticut and New York as the country approaches the tipping point of a majority being able to wager legally from home. — Bill King